Re: NT to W2K3 Migration
- From: "Joe" <no-emaill@xxxxxxx>
- Date: Wed, 10 May 2006 16:42:19 -0400
In a nutshell:
You cannot just promote a member server to AD. You would first need to
upgrade your PDC to windows 2000 or 2003, whichever flavor of AD you want to
use. During the final stage of the OS upgrade, DC promo runs which
"converts" this former NT 4.0 PDC into an AD domain controller. This is a
very abbreviated response as the process involves a bit more planning.
My first bit of advice before doing anything is to get another server online
as a BDC in your 4.0 domain. Running with just a PDC is asking for problems.
If that server dies, you will have some serious issues. This BDC can also be
used as a rollback server that is taken offline just before you begin the
upgrade process. If the migration goes south, you can bring this BDC back
online and promote it to PDC which will bring your domain back to status quo
prior to the upgrade.
"Deb-Mass" <DebMass@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:D2674D6A-C4C2-4A9F-A0D3-72F6C00F69DF@xxxxxxxxxxxxxxxx
Thanks for your help. It was doing all that reading that confused me in
the
first place. I'll figure it out. Thanks again.
--
Deb-Mass
"Jorge Silva" wrote:
Hi
Informative Sites:
Upgrading from Windows NT Server 4.0
http://www.microsoft.com/windowsserver2003/upgrading/nt4/default.mspx
How to Upgrade from Windows NT Server 4.0
http://www.microsoft.com/windowsserver2003/upgrading/nt4/howto/default.mspx
Best Practice Active Directory Design for Managing Windows Networks
http://www.microsoft.com/technet/prodtechnol/windows2000serv/technologies/activedirectory/plan/bpaddsgn.mspx#E1AAG
Considerations:
- Install the latest service pack.
http://www.microsoft.com/downloads
- Check Hardware.
Windows Catalog and HCL
http://www.microsoft.com/whdc/hcl/default.mspx
Active Directory Sizer
http://www.microsoft.com/windows2000/techinfo/reskit/tools/new/adsizer-o.asp
- Windows Application Compatibility
http://www.microsoft.com/technet/prodtechnol/windows/appcompatibility/default.mspx
- Document everything network related (users, groups, permissions,
printers,etc).
Upgrade or migrate?
Reasons to Upgrade
Especially for small organizations, the ease of an upgrade rather than a
new
installation can make sense. Generally, with an upgrade, configuration is
simpler, and your existing users, settings, groups, rights, and
permissions
are retained. Also, with an upgrade, you do not need to re-install files
and
applications.
Reasons to Migrate
There are good reasons to migrate rather than upgrade-especially when
dealing with large organizations. If you want to practice careful
configuration management, for example, for a server where high
availability
is important, you might want to perform a new installation on that server
instead of an upgrade. This is especially true for servers on which the
operating system has been upgraded several times in the past.
Upgrading Windows NT 4.0 Domains to Windows Server 2003 Active Directory
http://technet2.microsoft.com/WindowsServer/en/Library/b170bdc5-ba55-4184-8a8f-acb7705ff04a1033.mspx
Migrating Windows NT Server 4.0 Domains to Windows Server 2003 Active
Directory
http://www.microsoft.com/windowsserver2003/evaluation/whyupgrade/nt4/nt4domtoad.mspx
Active Directory Migration Tool v.2.0
http://www.microsoft.com/downloads/details.aspx?FamilyID=788975b1-5849-4707-9817-8c9773c25c6c&DisplayLang=en
Planning:
- Failover.
* Backup the Servers.
* Take at least one BDC Offline (In case of UPGRADE FAILURE you always
can
promote it to a PDC). The only drawback to this method is that all
changes
that were made while the safe BDC was offline are lost. To minimize this
loss, you could periodically turn the safe BDC on and off (when the
domain
is in a stable state) during the upgrade process, to update its safe copy
of
the directory.
To convert the BDC to a PDC: Start -> Programs -> Administrative Tools ->
Server Manager -> Select the BDC, then go to the Computer Menu -> choose
Promote to primary Domain Controller.
* Make sure that the Hardware and apps meets the requirements.
* Make sure that all Apps installed are compatible with W2K3 and don't
cause
problems with the upgrade process or pos upgrade process.
* Run from command prompt:
Cdsource\I386\winnt32.exe /checkupgradeonly
- Before Upgrade:
* You can install a new computer (more powerful) make it a BDC,
SYNCRONIZE
and promote it to PDC and them perform the upgrade on the new PDC.
* Windows 2000/XP always prefer Kerberos authentication, so if the newly
upgraded NT4 to Windows 2003 goes down (Offline), the client machines
won't
be able to authenticate in the domain.
* If this is the case, before upgrade the NT.4 PDC, make the necessary
changes on the registry (NT4Emulator). If the NT4Emulator is configured
on
the newly PDC, and you want o upgrade the Existent BDCs, you also need to
create a registry entry on the BDCs (NeutralizeNT4Emulator) before the
upgrade.
Check:
Windows 2000-based clients connect only to the domain controller that was
upgraded from Windows NT 4.0 in a mixed-mode domain
http://support.microsoft.com/?kbid=284937
How to prevent overloading on the first domain controller during domain
upgrade
http://support.microsoft.com/kb/298713/
Once that all domain controllers are upgraded, remove the registry
settings
created in the previous steps.
Note: This sometimes may not need: E.g - if all existent BDCs will be sun
upgraded to Windows 2003.
- Dns Planning:
Prior to beginning the upgrade from Windows NT Server 4.0 to the Windows
Server 2003 Active Directory service, ensure that you have designed a DNS
and Active Directory namespace and have either configured DNS servers or
are
planning to have the Active Directory Installation Wizard automatically
install the DNS service on the domain controller.
Active Directory is integrated with DNS in the following ways:
Active Directory and DNS have the same hierarchical structure. Although
separate and implemented differently for different purposes, an
organization's namespace for DNS and Active Directory have an identical
structure. For example, microsoft.com is both a DNS domain and an Active
Directory domain.
DNS zones can be stored in Active Directory. If you are using the Windows
Server DNS service, primary zone files can be stored in Active Directory
for
replication to other Active Directory domain controllers.
Active Directory uses DNS as a locator service, resolving Active
Directory
domain, site, and service names to an IP address. To log on to an Active
Directory domain, an Active Directory client queries its configured DNS
server for the IP address of the Lightweight Directory Access Protocol
(LDAP) service running on a domain controller for a specified domain. For
more information on how Active Directory clients rely on DNS, see
"Locating
a Domain Controller" in the Windows Server 2003 on-screen Help and
Support
Center.
While Active Directory is integrated with DNS and they share the same
namespace structure, it is important to distinguish the basic difference
between them:
DNS is a name resolution service. DNS clients send DNS name queries to
their
configured DNS server. The DNS server receives the name query and either
resolves the name query through locally stored files or consults another
DNS
server for resolution. DNS does not require Active Directory to function.
Active Directory is a directory service. Active Directory provides an
information repository and services to make information available to
users
and applications. Active Directory clients send queries to Active
Directory
servers using LDAP. In order to locate an Active Directory server, an
Active
Directory client queries DNS. Active Directory requires DNS to function.
If use BIND DNS servers Make sure that you have BIND 8.1.2
- Supports: Srv records, Dynamic Updates, Doesn't Support
Secure
Dynamic Updates (this is one disadvantage over the MS Dns server Servers,
and represents security issues).
- Create Primary Zone
If Use 2003 DNS
* Create Primary Zone
* You can use an pre existent Dns or you can create it during the upgrade
process.
* Convert to AD-Integrated.
* NetDiag /fix (This is an extra measure, to register the necessary dns
records).
Check:
Troubleshooting DNS
http://technet2.microsoft.com/WindowsServer/en/Library/de2aa69d-1155-4dc9-a651-e8362f6a81c81033.mspx
How to Verify the Creation of SRV Records for a Domain Controller
http://support.microsoft.com/?id=241515
Verify DNS server responsiveness using the nslookup command
http://technet2.microsoft.com/WindowsServer/en/Library/f8761f04-d665-4507-9509-ebb92bbb66ef1033.mspx
- The Upgrade.
* Check if you're on the PDC -> Start -> Programs -> Administrative
Tools ->
Server Manager.
Right click on Network Neighborhood -> check the name.
Run from command prompt:
Cdsource\I386\winnt32
* The first server running Windows NT Server 4.0 that you must upgrade is
the primary domain controller (PDC), then you upgrade all remaining BDCs.
To
check if you're on the PDC: Start -> Programs -> Administrative Tools ->
Server Manager.
Check:
How To Upgrade a Windows NT 4.0-Based PDC to a Windows Server 2003-Based
Domain Controller
http://support.microsoft.com/?id=326209
If you don't have windows 2000 (Only NT4 and Windows 2003) in the domain
choose the FFL (Forest Functional Level) Windows 2003 interim.
* Make sure that your DCs Dns properties point to Right Dns server
(usually
the Dc is also a Dns server so it must point to itself).
* Once you have upgraded the Windows NT Server 4.0 and earlier PDC, you
can
proceed to upgrade all remaining BDCs.
* Make sure that you have 1 GC per site (GCs are needed unless: you only
have one domain, or the DFL is prior to Windows 2000 or Windows 2003).
* Make sure that network clients point to the Network Dns server only
(Usually the DC).
* If everything is ok, then and if all DCs are already Windows 2003, now
it's
time to remove the registry entries (NT4Emulator, NeutralizeNT4Emulator),
and make the DFL and FFL windows 2003.
Verifying Active Directory Installation
http://technet2.microsoft.com/WindowsServer/en/Library/3d157c1a-5c80-4947-ba8b-a02e5fb1dada1033.mspx
--
I hop that helps
Good Luck
Jorge Silva
MCSA
Systems Administrator
"Deb-Mass" <DebMass@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:F2620F54-0B33-4920-8991-D3BB8AEE3EC5@xxxxxxxxxxxxxxxx
I have a domain with an NT 4 PDC and two W2K3 Member Servers (I recently
migrated them). I want to use ADMT to make one of the MS the DC. I
want
to
do this without creating a separate domain. Is this possible? I'd
really
like to keep the same domain name and use a one domain structure.
--
Deb-Mass
.
- References:
- Re: NT to W2K3 Migration
- From: Jorge Silva
- Re: NT to W2K3 Migration
- From: Deb-Mass
- Re: NT to W2K3 Migration
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